Just reached out as well. Will update here what they say.
Support said that they would only consider it if you purchased before September 2025.
Since OCPP seems to be dead for this device (massive 50% pay wall) I figured out you can use the REST sensor to poll its web interface
you can use curl to get a listing of all values, the user name and password parameters are optional if you didn’t enable authentication.
curl -X POST http://[device IP]/main -H "Content-Type: application/json" -u "[username]:[password]"
This lets me get the power info and general state, there are many more items you can add but I was really only interested in power monitoring.
I am using username and password and the secrets file you can omit those lines completely if you have auth turned off.
I don’t know how stable this will be between firmware updates but this uses basic home assistant rest capabilities. I am polling every 10 seconds.
rest:
- resource: "http://[device IP]/main"
scan_interval: 10
method: POST
username: !secret grizzl-e_user
password: !secret grizzl-e_pass
authentication: basic
headers:
User-Agent: Home Assistant
Content-Type: application/json
sensor:
- name: "Grizzl-E Station ID"
value_template: "{{ value_json.stationId }}"
- name: "Grizzl-E Power"
value_template: "{{ value_json.powerMeas }}"
unit_of_measurement: "W"
device_class: power
state_class: measurement
- name: "Grizzl-E Temperature 1"
value_template: "{{ value_json.temperature1 }}"
unit_of_measurement: "°C"
device_class: temperature
state_class: measurement
- name: "Grizzl-E Energy"
value_template: "{{ value_json.totalEnergy }}"
state_class: total_increasing
unit_of_measurement: kWh
device_class: energy
1 Like
Hey everyone. I started a new article on United Chargers’ paywalling of the OCPP configuration on their EV chargers over at the Consumer Rights wiki: https://consumerrights.wiki/w/United_Chargers_Inc._puts_Open_Source_interface_access_behind_paywall_on_Grizzl-E_car_chargers.
I would appreciate if you could add your experience dealing with them on this topic to the article so that there is more meat on that particular bone. The more information is available, the more likely we are to get United Chargers to revert their anti-consumer practices.
I’ve been dealing directly with United Chargers support regarding my Grizzl-E 48A OCPP model since early September 2025. Initially, my charger’s OCPP settings were fully accessible and connected to my own standalone OCPP server for Home Assistant integration.
In mid-September, after I contacted United Chargers for help updating the firmware (since the unit wouldn’t update over-the-air), they provided me with a manual firmware file to install. That update locked the OCPP configuration page behind a password and removed my ability to view or change settings. It also completely broke OCPP connectivity and remote logging. I was never informed this would happen beforehand.
After several weeks of follow-up and a phone call where support promised a future fix, I finally received another firmware file in mid-October. That update restored access to the OCPP settings, and the charger appeared to reconnect to my OCPP server successfully.
Because of this experience, I’ve blocked the charger’s ability to update to prevent any future firmware from being pushed that could again remove open OCPP access. I don’t plan to install any new firmware unless it’s fully documented and confirmed to preserve OCPP functionality. It’s also worth noting that United Chargers continues to sell this model advertising OCPP support, with no disclosure that access to that feature has been restricted or placed behind a paywall.
Make sure you store that on GitHub in case you need it in the future.
I literally just got a Grizzl-E Smart installed - electrician just pulled out of the driveway. When I settled on getting one of these months ago the paywall wasn’t up. What’s the current status on getting things set up with Home Assistant? There are a number of GitHub repos floating around - just hoping somebody can give a quick summary.
If I’m lucky enough and my firmware hasn’t been updated to a paywalled one, where should I begin? Otherwise it looks like @BlinkyLights has the REST API parsing quite nicely for simple energy monitoring.
Block internet
Get copy of unpaywalled firmware as backup for future
Never update